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Cheap flights from Austin to Illinois from $67

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Austin to Illinois departing on 7/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Austin to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
9:13 pm - 7:23 pm
AUS
-
STL
22h 10m
1 stop
Frontier Logo
6:31 pm - 12:45 pm
STL
-
AUS
18h 14m
1 stop
$143Frontier
Mon, Jun 8 - Sun, Jun 14
Frontier Logo
10:28 am - 7:23 pm
AUS
-
STL
8h 55m
1 stop
Frontier Logo
5:27 pm - 11:49 am
STL
-
AUS
18h 22m
1 stop
$179Frontier
Tue, Jun 2 - Fri, Jun 5
United Airlines Logo
6:29 pm - 11:57 pm
AUS
-
STL
5h 28m
1 stop
United Airlines Logo
9:14 am - 2:41 pm
STL
-
AUS
5h 27m
1 stop
$186United Airlines
Fri, Jun 5 - Sat, Jun 6
American Airlines Logo
7:56 pm - 11:58 pm
AUS
-
STL
4h 02m
1 stop
American Airlines Logo
7:21 pm - 11:58 pm
STL
-
AUS
4h 37m
1 stop
$191American Airlines
Mon, Jun 1 - Sat, Jun 6
American Airlines Logo
2:43 pm - 9:42 pm
AUS
-
STL
6h 59m
1 stop
American Airlines Logo
5:25 am - 10:42 am
STL
-
AUS
5h 17m
1 stop
$200American Airlines
Thu, May 28 - Sun, May 31
Delta Logo
10:35 am - 4:37 pm
AUS
-
MLI
6h 02m
1 stop
Delta Logo
5:56 am - 12:21 pm
MLI
-
AUS
6h 25m
1 stop
$231Delta
Tue, Jun 30 - Sat, Jul 4
Delta Logo
10:35 am - 4:37 pm
AUS
-
MLI
6h 02m
1 stop
Delta Logo
5:17 pm - 12:25 am
MLI
-
AUS
7h 08m
1 stop
$270Delta
Wed, Jun 10 - Sat, Jun 13
United Airlines Logo
3:37 pm - 9:09 pm
AUS
-
MLI
5h 32m
1 stop
United Airlines Logo
8:10 am - 1:48 pm
MLI
-
AUS
5h 38m
1 stop
$311United Airlines
Sat, Aug 8 - Wed, Aug 12
Multiple Airlines Logo
12:15 pm - 8:15 am
AUS
-
RFD
20h 00m
1 stop
Multiple Airlines Logo
7:50 pm - 4:38 pm
RFD
-
AUS
20h 48m
1 stop
$391Multiple Airlines
Fri, Jul 3 - Fri, Jul 10
Multiple Airlines Logo
10:52 pm - 12:23 pm
AUS
-
RFD
13h 31m
1 stop
Multiple Airlines Logo
9:19 am - 10:04 am
RFD
-
AUS
24h 45m
2 stops
$395Multiple Airlines
Wed, Jun 3 - Sun, Jun 7

Delta flights from Austin to Illinois

Our best Delta deals on Austin to Illinois flight tickets
Delta
Jun 30
AUS10:35 amAustin Bergstrom
6h 02m
1 stop
MLI4:37 pmMoline Quad-City
Jul 4
MLI5:56 amMoline Quad-City
6h 25m
1 stop
AUS12:21 pmAustin Bergstrom
$231
Delta
Jun 10
AUS10:35 amAustin Bergstrom
6h 02m
1 stop
MLI4:37 pmMoline Quad-City
Jun 13
MLI5:17 pmMoline Quad-City
7h 08m
1 stop
AUS12:25 amAustin Bergstrom
$270
Delta
May 28
AUS10:38 amAustin Bergstrom
5h 59m
1 stop
MLI4:37 pmMoline Quad-City
May 31
MLI5:56 amMoline Quad-City
5h 26m
1 stop
AUS11:22 amAustin Bergstrom
$275

United Airlines flights from Austin to Illinois

Our best United Airlines deals on Austin to Illinois flight tickets
United Airlines
Jun 5
AUS6:29 pmAustin Bergstrom
5h 28m
1 stop
STL11:57 pmLambert-St Louis
Jun 6
STL9:14 amLambert-St Louis
5h 27m
1 stop
AUS2:41 pmAustin Bergstrom
$186
United Airlines
May 27
AUS5:30 amAustin Bergstrom
4h 37m
1 stop
STL10:07 amLambert-St Louis
May 27
STL5:29 pmLambert-St Louis
5h 22m
1 stop
AUS10:51 pmAustin Bergstrom
$204
United Airlines
May 27
AUS6:40 amAustin Bergstrom
5h 31m
1 stop
STL12:11 pmLambert-St Louis
May 30
STL5:29 pmLambert-St Louis
5h 22m
1 stop
AUS10:51 pmAustin Bergstrom
$209

momondo Fare Finder

 
Customize your flight search to find flights from Austin to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated May 15, 2026.
Use the filters below to find and compare flights from Austin to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Mon 6/8

9:13 pm-7:23 pm

1 stop22h 10m

Lambert-St Louis

Sun 6/14

6:31 pm-12:45 pm

1 stop18h 14m

$143

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 6/2

10:28 am-7:23 pm

1 stop8h 55m

Lambert-St Louis

Fri 6/5

5:27 pm-11:49 am

1 stop18h 22m

$179

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Fri 6/5

6:29 pm-11:57 pm

1 stop5h 28m

Lambert-St Louis

Sat 6/6

9:14 am-2:41 pm

1 stop5h 27m

$186
Quickest round-trip

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Mon 6/1

7:56 pm-11:58 pm

1 stop4h 02m

Lambert-St Louis

Sat 6/6

7:21 pm-11:58 pm

1 stop4h 37m

$191

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Thu 5/28

2:43 pm-9:42 pm

1 stop6h 59m

Lambert-St Louis

Sun 5/31

5:25 am-10:42 am

1 stop5h 17m

$200

AustinMoline

AUS - MLI

AUSMLI

Austin Bergstrom

Tue 6/30

10:35 am-4:37 pm

1 stop6h 02m

Moline Quad-City

Sat 7/4

5:56 am-12:21 pm

1 stop6h 25m

$231

AustinMoline

AUS - MLI

AUSMLI

Austin Bergstrom

Wed 6/10

10:35 am-4:37 pm

1 stop6h 02m

Moline Quad-City

Sat 6/13

5:17 pm-12:25 am

1 stop7h 08m

$270

AustinMoline

AUS - MLI

AUSMLI

Austin Bergstrom

Sat 8/8

3:37 pm-9:09 pm

1 stop5h 32m

Moline Quad-City

Wed 8/12

8:10 am-1:48 pm

1 stop5h 38m

$311

AustinChicago

AUS - RFD

AUSRFD

Austin Bergstrom

Fri 7/3

12:15 pm-8:15 am

1 stop20h 00m

Chicago Greater Rockford

Fri 7/10

7:50 pm-4:38 pm

1 stop20h 48m

$391

AustinChicago

AUS - RFD

AUSRFD

Austin Bergstrom

Wed 6/3

10:52 pm-12:23 pm

1 stop13h 31m

Chicago Greater Rockford

Sun 6/7

9:19 am-10:04 am

2 stops24h 45m

$395

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Austin to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Austin is in October. Flight prices, which tend to average around $46, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of October, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $49.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Austin to Illinois is on a Thursday when prices can be found for as low as $353. Flights from Austin to Illinois on a Sunday will generally be more expensive and average around $593. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Austin to Illinois during this time can be as low as $236. Flights at noon are often more expensive with an average ticket price of $516.

What is the cheapest Austin Bergstrom to Illinois flight route?

Fly from Austin Bergstrom to Chicago O'Hare Intl for the best Austin Bergstrom - Illinois flight prices

How far in advance should I book a flight from Austin to Illinois?

You are more likely to see cheaper flights to Illinois from Austin when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $292 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Austin for as low as $248 on momondo.

Can stopping save me money on Austin to Illinois flights?

No. A direct flight is the cheapest option for a flight between Austin to Illinois.

Cheap Austin to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Austin to Illinois

Best Price Found

$171

Fastest flight time

2h 00m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Austin in the past 72 hours is $171. The best round-trip flight deal from Austin to Illinois found on momondo in the last 72 hours is $287.
The fastest flight from Austin to Illinois takes 2h 00m
Direct flights go from Austin to Illinois every day.
There are 98 airports in Illinois. From Austin there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from Austin to Illinois

  • When did momondo last update prices for flights from Austin Bergstrom Airport to Illinois?

    Prices for flights from Austin Bergstrom Airport to Illinois refresh daily.

  • How many operators does momondo search for flights from Austin Bergstrom Airport to Illinois?

  • How old do you have to be to fly from Austin Bergstrom Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Austin Bergstrom Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Austin to Illinois?

Best airlines flying from Austin to Illinois

Compare and see reviews for airlines that fly from Austin to Illinois with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $67Free CancellationRating
5.6
2,951 reviews
Search Frontier flights
SouthwestPriceFrom $137Free CancellationRating
8.0
4,299 reviews
Search Southwest flights
American AirlinesPriceFrom $161Free CancellationRating
7.1
11,662 reviews
Search American Airlines flights
United AirlinesPriceFrom $182Free CancellationRating
7.4
9,723 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Austin to Illinois?

Finding the right flight to Illinois from Austin is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

Can I find flights from Austin to Illinois with flexible booking policies on momondo?

Yes. All flights to Illinois from Austin on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Austin to Illinois?

momondo provides multiple filters to help you find the best flight to Illinois from Austin. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Austin to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Austin to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to Illinois

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